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  • 1
    Electronic Resource
    Electronic Resource
    Excited-state absorption spectroscopy of ortho-metalated iridium(III) complexes (1987)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 91 (1987), S. 6104-6106 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100308a012
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  • 2
    Electronic Resource
    Electronic Resource
    Dumbbell Type Jugular Foramen Meningioma Extending Both into the Posterior Cranial Fossa and into the Parapharyngeal Space: Report of 2 Cases with Vascular Reconstruction (1998)
    Springer
    Acta neurochirurgica 140 (1998), S. 323-331 
    Details
    ISSN: 0942-0940
    Keywords: Keywords: Jugular foramen; meningioma; carotid ligation; cerebral revascularisation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Two cases with huge dumbbell type jugular foramen meningioma with extension into the parapharyngeal space are reported. A well co-ordinated surgical strategy for total resection to this high risk tumour with neurosurgeons, otolaryngologists and plastic surgeons is mandatory to minimise operative complications. Both of our patients presented with a cervical mass and lower cranial nerve palsies, and had huge dumbbell type masses extending from the posterior cranial fossa through the jugular foramen to the parapharyngeal space, encasing the cervical internal carotid artery. Gross total resection of the tumours was successfully achieved by basically a 2-stage operation. In the first stage, posterior fossa tumours were removed by the transjugular approach, combined with the petrosal approach in one case. In the second stage, cervical tumours were removed along with the cervical carotid artery by the transcervical and/or transmandibular approach, followed by vascular reconstruction from the ipsilateral carotid artery to the middle cerebral artery using saphenous vein graft. From these experiences, we recommend this 2-stage operation for large dumbbell type meningiomas extending to the infratemporal/parapharyngeal space. The intracranial tumour is removed at the first operation. The extracranial portion is resected at the second, and if necessary, the involved cervical carotid artery is resected and simultaneous revascularisation using saphenous vein graft is performed with a vascularised free muscle graft. This strategy could maximise the functional preservation on the one hand, and minimise the surgical risk, such as postoperative infection, on the other.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007010050105
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  • 3
    Electronic Resource
    Electronic Resource
    Essentials of surgical treatment for intramasseteric hemangioma (1995)
    Springer
    European archives of oto-rhino-laryngology and head & neck 252 (1995), S. 125-129 
    Details
    ISSN: 1434-4726
    Keywords: Intramuscular hemangioma ; Intramasseteric hemangioma ; Surgical treatment ; Facial nerve ; Lymphedema
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Although rare, surgical treatment may become necessary for patients with intramasseteric hemangiomas. Possible bleeding, neural injury or postoperative dysfunction are factors limiting surgical approaches. We present the following surgical highpoints for tumors involving the masseter muscles. These include careful preoperative planning with computed tomography and magnetic resonance imaging, as well as a surgical approach that provides adequate exposure for optimal tumor resection and identification of vital anatomic structures. In particular, care must be taken to preserve branches of the facial nerve. In certain cases, preoperative embolization or ligation of vessels feeding tumor helps to minimize blood loss. Whenever possible, complete tumor should be adequately resected with a surrounding margin of normal muscle. Postoperative lymphedema can be minimized by preserving the mandibular periosteum and oral or parenteral use of medication with anti-inflammatory agents. At the University of Tokyo, continuous suction is preferred with a fenestrated drain or pressure dressing with a Penrose drain should be applied to prevent hematoma. Postoperative dysfunction, such as trismus, is prevented by supportive measures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00178096
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  • 4
    Electronic Resource
    Electronic Resource
    Analysis of tumor recurrence following anterior skull base surgery (1998)
    Springer
    European archives of oto-rhino-laryngology and head & neck 255 (1998), S. 155-162 
    Details
    ISSN: 1434-4726
    Keywords: Key words Skull base surgery ; Neoplasms ; Tumor ; recurrence ; Anterior cranial fossa ; Salvage surgery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In order to elucidate the predictive factors for tumor recurrence following skull base surgery and the significance of salvage surgery in cases of recurrence, we retrospectively surveyed the incidence, site, and time of local recurrences in 20 patients who underwent either anterior or anterolateral skull base surgery for malignant tumors invading the anterior cranial fossa between 1989 and 1995 at the University of Tokyo Hospital. Nineteen patients underwent total resections of malignancies, with recurrences and/or metastases occurring in 13. Local recurrences occurred at the skull base in 5 patients (group A), outside the skull base in 4 patients (group B), and in both locations in 2 patients (group C). The mean time interval between surgery and recurrence was 29 months in group A, and 4.2 months in groups B and C. The local recurrence-free rates were 51% at 1 year and 34% at 5 years. Both brain and/or dural invasion and a microscopic positive surgical margin were proven to be predictive factors for tumor recurrences. The 3-year local recurrence-free rate was 20% in patients with dural invasions and 83% in those without. The incidence of recurrence-free patients was 79% in cases with negative margins, with no patient being recurrence-free in positive cases. All recurrences found more than 6 months after the initial surgery resulted in patients being salvaged successfully by a second operation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004050050034
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  • 5
    Electronic Resource
    Electronic Resource
    Postjunctional α2-adrenoceptors in blood vessels of human nasal mucosa (1988)
    Springer
    European archives of oto-rhino-laryngology and head & neck 245 (1988), S. 127-131 
    Details
    ISSN: 1434-4726
    Keywords: α-adrenoceptor ; Nasal blood vessels ; Vasoconstriction ; Calcium entry blocker ; Nasal allergy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Human nasal mucosa has various types of blood vessels and is a good tissue for demonstrating receptors for many vasoactive substances, including α-adrenoceptors. In contrast to the large contractile response induced by α2-agonists, our studies have shown that α2-agonists produce a small maximal contraction. This α2-induced response was easily blocked by α1-antagonists, indicating that it is evoked, at least partially, by the stimulation of α1-adrenoceptors. Noradrenaline (NA)-induced contractions could not be abolished by either α1- or α2-antagonists alone, but were almost completely blocked by the combination of both antagonists. This suggests the presence of postjunctional α2-adrenoceptors. The low-maximal responsiveness to α2-agonists and calcium independency of NA-induced contractions were distinct from our former results obtained on canine nasal specimens.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00481450
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  • 6
    Electronic Resource
    Electronic Resource
    STM Spectroscopy on Anisotropic Superconductors (1999)
    Springer
    Journal of superconductivity 12 (1999), S. 519-523 
    Details
    ISSN: 1572-9605
    Keywords: STM ; electron tunneling ; organic superconductors ; pairing symmetry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The superconducting phase of organic superconductors κ-(BEDT-TTF)2Cu(NCS)2 and (MDT-TTF)2AuI2 was investigated by the electron tunneling spectroscopy using low temperature STM. The tunneling differential conductance at the lateral surface of κ-(BEDT-TTF)2Cu(NCS)2 varies its shape depending on the tip direction. The in-plane anisotropy of the conductance is well explained by the d-wave symmetry with line nodes along the direction 45° from the c-axis. For (MDT-TTF)2AuI2, the tunneling conductance at T = 1.4 K shows the superconducting energy gap structure clearly. The finite conductance inside the gap edge suggests the gap anisotropy. The tunneling spectrum is explained by the d-wave pairing. The obtained gap Δ0 = 2 meV (2Δ0/kT c = 12) is larger than that of the weak coupling limit. The pseudogap structure is observed near T c .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007732201440
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  • 7
    Electronic Resource
    Electronic Resource
    Water-Soluble contrast enhancing materials - new photobleachable dyes (1989)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 29 (1989), S. 898-901 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Many styrylpyridinium compounds (SPC), which are very stable in the dark, were prepared and evaluated as photobleachable dyes for contrast enhanced lithography (CEL). The photobleaching characteristics of water-soluble contrast enhancing materials composed of SPC and water-soluble polymer depend on the structure of the SPC and the kind of polymers used. The technique using SPC-based CEL proved to be very effective for the resist pattern profiles.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760291403
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  • 8
    Electronic Resource
    Electronic Resource
    Positronium in a layered-structure material: Montmorillonite (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 239 (1999), S. 325-328 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Positron-lifetime and Doppler-broadened spectra were measured for ion-exchanged (Na+, Zn2+, Al3+, Cu2+ and alkylammonium) montmorillonites (mont). The line-shape parameters of the spectra for alkylammonium-intercalated monts were almost equal to those observed for the corresponding alkylammonium salts used for the intercalation. Upon exchange of diamagnetic ions in the interlayer spaces of mont for paramagnetic Cu2+ ions, the longest-lived component ascribed to ortho-positronium (Ps) was shortened from ca 1 to 0.62 ns, and the Doppler-broadened spectrum was narrowed. These results demonstrate that Ps atoms are predominantly distributed in the interlayer spaces of mont, rather than in the aluminosilicate layers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02349505
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  • 9
    Electronic Resource
    Electronic Resource
    Photosensitive resins containing p-dimethylaminobenzylidene derivatives and diphenyliodonium salt as photoinitiators (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 34 (1987), S. 2747-2756 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A series of p-dimethylaminobenzylidene derivatives was able to sensitize the photodecomposition of diphenyliodonium salt to afford highly photosensitive negative-type resins. When a polymer-bearing methacryloylated group in the side chain was sensitized with a combination of the p-dimethylaminobenzylidene compounds and the iodonium salt, the polymer demonstrated high sensitivity even to 488 nm light emitted from an Argon laser. The same photoinitiator systems were applicable to insolubilize poly(glycidyl methacrylate) through cationic photopolymerization. The storage stability of these types of photoinitiators depends on the structure of the benzylidene compounds; decreasing the basicity of the amino group enhanced the thermal stability.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1987.070340810
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